# On a class of sofic affine invariant subsets of the 2-torus related to an Erdős problem

Abstract : Let 1 β G be the closed projection on the 2-torus of the (modified) Rademacher graph in base β. The smallest compact containing G and left invariant by the diagonal endomorphism ${(x,y)\mapsto(2x,\beta y)}$ (mod 1) is denoted by K. For β a simple Parry number of PV-type, K is proved to be a sofic affine invariant set with a fractal geometry closed to the one of G. When β is the golden number, we prove the uniqueness of the measure with full Hausdorff dimension on K.
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https://hal.archives-ouvertes.fr/hal-01387010
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Submitted on : Tuesday, October 25, 2016 - 8:45:43 AM
Last modification on : Monday, March 4, 2019 - 2:04:22 PM

### Citation

Eric Olivier. On a class of sofic affine invariant subsets of the 2-torus related to an Erdős problem. Monatshefte für Mathematik, Springer Verlag, 2012, 165 (3-4), pp.447--497. ⟨10.1007/s00605-011-0296-2⟩. ⟨hal-01387010⟩

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